#include <stdio.h>  

void cal(int x, int y, int *sum, int *diff, int *mul, int *mod) {
    *sum = x + y;
    *diff = (x>y)?x-y:y-x;
    *mul = x * y;
    *mod = x / y;
}

int main() {
    int x = 20;
    int y = 6;
    int sum, diff, mul, mod;

    cal(x, y, &sum, &diff, &mul, &mod);

    printf("x = %d, y = %d\n", x, y);
    printf("xとyの和は %d\n",sum);
    printf("xとyの差は %d\n", diff);
    printf("xとyの積は %d\n", mul);
    printf("xとyの商は %d\n", mod);

    return 0;
}